It’s probably true that most of our readers are more than happy using a traditional broadband provider for their home’s Internet access, but I’m sure there’s a few of you out there who are mobile warriors who want the lowdown on which cellular network currently has the fastest 3G download and upload speeds. So, it’s with great respect I point you folks to the hard work Gizmodo put into conducting their 8 major city nationwide test comparing AT&T, Sprint, Verizon’s mobile broadband service. Verdict: Best Overall Download Speed Winner – Sprint, Best Overall Upload Speed Winner – AT&T (Sprint came in second).